First, where do you live? We need to know your climate and therefore if any of these will grow there. If they won't, maybe people here can suggest something comparable in color and form that will do OK in your climate. Image #1: Are you talking about the Dwarf Alberta Spruce? or what looks like a Dogwood? Image #1: small yellow shrubs -- too far away to tell for sure. Could be Goldmound Spirea, could be the new growth on Nandina 'Firepower'. Image #2: Reddish shrub looks like Japanese maple - Acer palmatum dissectum (weeping type). Greenish yellow shrubs -- too far away to tell. Perhaps Spirea, perhaps Euonymus. Or something else entirely. Image #3: too far away to tell for sure. Could be Firepower again (new growth), or Euonymus Emerald 'n' Gold, or Golden Barberry or something else.

be nice to know where you are.. for me in MI ... hydrenga basically die back to 3 or 4 inches ... and i prune back to the lowest good buds .. meaning if there are some winter damaged ones above it.. they arent worth coddling ... so you can see how my advice differs wildly from the z8 peeps ... also.. on all 3.. it would be good if you pull the mulch back 3 to 6 inches ... also ... the one time i used black mulch.. i cooked everything in the bed.. as the mulch got too hot in july and august in sun... in the heat of summer... never again ... and that may be why a 2 year old hydrenga looks so poor ... they are heavy water users .. and do keep in mind.. there are all kinds of H .... the first vaguely reminds me of a Caryopteris .. but straight down pix make our job hard ... the bottom line.. let them bud out.. and just prune back to live buds ... that rule never fails... however.. some plants do better.. in some locations by going even further ... you can not go wrong... by doing the least.. and observing for a season ... just give them time to bud further out ... ken ps: and God forbid.. when you pull the mulch back ... you find landscape fabric under there... that will make the soil even hotter in summer ...

the buds are there in fall .. tiny .. but recognizable ... so any severe winter.. can destroy them ... if its a regular old L.. its way too close to the house .. when the time comes.. look into 'rejuvenation pruning of flowering shrubs' but your comment that they havent grown much.. makes me wonder if it could be a dwarf.. like pallidin ...Syringa meyeri 'Palibin' .. but that would not fit with gals vulgaris suggestion ... ken https://www.google.com/search?q=Syringa+meyeri+%27Palibin%27&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjK17GvtonMAhXD5yYKHTRYDR0Q_AUICCgC&biw=1187&bih=745&dpr=0.9

Valerianellas are tiny little things. Unless I have completely the wrong sense of scale this is not Valerianella. Plus leaf shape, texture and veination all look different to me different. Are you 100% certain that no. 2 had 'tiny' flowers? The buds don't look tiny and it is so reminiscent of something along the lines of Silene, Saponaria or Lychnis. 'Will the bleeding heart hurt the boxwood because it's too close?' Much more likely the other way around ;-)